diff --git a/test.sh b/test.sh
index 238569f..950dfb6 100755
--- a/test.sh
+++ b/test.sh
@@ -150,6 +150,9 @@ test_dirname() {
 
     result="$(dirname "something//////////.///////////")"
     assert_equals "$result" "something"
+
+    result="$(dirname "//////")"
+    assert_equals "$result" "/"
 }
 
 test_basename() {